Rubber-packed coupling for lock-bar pipe.



G. P. BOOTHE. RUBBER PAoKED ooUPLING B0B Loox BAB PIPE. APPLICATION FILED 00T. 14, 1909.

PatentedApr. 8, 1913.

r;- K I f f @www I .9B @im UNTTED sTATEs PATENT oEEIoE.- f

GEORGE P. BOOTHE, OF BRADFORD, PENNSYLVANIA,.;,ASSIGNOR TO S. R. .DRFSSER MANUFACTURING" COMPANY, OF BRADFORD, PENNSYLVANIA.

RUBBER-PACKED coUrLINe EonLocx-Bm PIPE.

'Speoieaton of Letters Patent.

ratentedapr. 8,1913.

To all whom t may concern.'

Be it known that I, GEORGE P. Booman, citizen `of the United States, residing at Bradford, in the county of McKean and State of Pennsylvania, have invented certain new and useful Improvementsin Rublber-Packed Couplings for Lock-Bar Pipe; and I do hereby declare the following to be a full,.clear,\and exact description of the invention, suchas will enable others skilled in the art to which it; appertains to make and use the same.

This inventionnconsists in the novel features hereinafter described reference being .had to the accompanying, drawing, which illustrates theboest form in which I have contemplated embodying my invention and said invention is fully disclosed in the following description and claim.

In the drawings, Figure 1 represents a perspective viewa of a middle ring for a lock ar pipe coupling, embodying my invention. Fig. 2 is a sectional elevation, of the same showing the end of la lock bar pipe section fitting within the same, and Figs@ is a `transverse section on line 3 3 of Fig. 2.

' into nearly a4 ,In the manufacture of lock-bar pipe, plates of wrought 'metal are prepared of a length equal to the pipe section to be made therefrom and having their longitudinal edges trued so as to lie/parallel, and upset to give the plate a 'greater thickness at-the eX- treme edge. The simplest vform'of the lock bar-pipe, which is employed' for the smaller sizes; is madefby bending or rolling, the plate tubular or cylindrical form,

1 and introducing the meeting. upset'. edges into grooves formed on opposite sides of a bar, the walls ing then compressed by hydraulic pressure or otherwise upon the upset edges` of being bent in to nearly semilcylindrical form, and having their edges connected by two in the accompanying drawings.

of the grooves inthe bar bep the." plate, thus completing the pipe. In making"` larger sizes of lockbar pipetwo such plates are employed each lock bars as shownI Larger sizes of`lock`bar pipek are also made by'erIi-- Ywalls ofthe pipe, and therefore, the ordinary pipe couplings cannot be employed for connecting them. Referring to the drawings, the middle ring or sleeve which forms the subject matter of the invention is illustrated in perf spective in Fig. 1. j The said ring 1, is formed of wrought metal, as wrought iron or steel, and is -preferably formed from a flat plate of a length substantially equal to the periphery of the' ring, which is bent into ring form'after which the ends'are welded together. The ring 1 is preferably made of slightly larger diameter than the pipe sections. with which it is to be used, and is given its final shape in suit-able dies or molds which reduce the main diameter of the rin to conform to the pi 'e sections with whic it is to be used, and orm the surplus material in the ring into a longitudinally extending groove or grooves 2, to it over the outer surfaces vof the lock bar 3, on the pipe sections 4, the number of said grooves 2 being determined by the number of lock bars on the pipes ring 1 is also provided at each end with an outwardly flared marginal portion 5, to form a @packing recess,and the said outwardly flared portions are eachprovided with which it is to be used. The

with an outwardly curved portion 6 eccentric tothe main portions thereof in line with the ends of the longitudinal groove or grooves 2. l

The ring 1 is also provided centrally on its interior withl a centering stop against which the meeting lends of the `pipe sections abut to center' the ring over the'joint and this centering stop is preferably in the form of an annular, inwardly extending flange 7, jwhich follows the contour of the interior of the vring, and the grooved portions thereof, as shown. I' may, however, form a centering stop within the ring, oin other ways. This ring is used in conjunction with packing rings- (of rubber Aor other suitable material), clamping' 'rings' and bolts connecting the same, for connectin the meeting ends of Itwo sections of lockar pipe, andit will be seen that it accommodates the lock bars of the pipe sections and provides a uniform lock bars `terior of thel pipe walls and the thereof. l

Whatv I Vclaim and desire-to secure by Letters Patent is z- A wrought metal ring for a rubber packed pipe 'coupling for lock bar pipe, said ring 5 having walls adapted to receive plain portions of the pipe and provided at each end with outwardly bent anges to form packing recesses, said walls being compressed to a circle approximately the exterior of the 10 plain pipe portions, surplus metal from the walls forming one or more grooves to retending .outwardly from the ianges.

In testimony whereof II afiix my signature, in the presence of two witnesses.

n GEORGE P. BOOTHE.

Witnesses:

vM. E. CLARK, K H. M. WICK. 

